What It Is — FC Simplex Coupler
The HRFC-PA11-G1(40) is a simplex FC-to-FC fiber optic coupler from the Hirose HRFC series. It is a panel-mount adapter with a square flange, designed to join two FC-terminated simplex cables in a bulkhead or enclosure wall. The housing is silver-finished brass and zinc, with a phosphor bronze ferrule.
Panel mount with a square flange — the coupler secures through a cutout in the panel and is held by the flange and mating hardware (not included). The simplex configuration handles one fiber channel per coupler.